docs: def get_experimental_structures(self):
          """DictList: Return a DictList of all experimental structures in self.structures"""
          # TODO: change to a property?
          if self.representative_structure:
              return DictList(x for x in self.structures if x.is_experimental and x.id != self.representative_structure.id)
          else:
              return DictList(x for x in self.structures if x.is_experimental)